My current switch is loud and it turns on and off every 30 seconds when water is running. Is that normal, a plumber suggested I could have water tank issue.

Here's how I handled this... shut off and drain well line (or relieve pressure in system). There is a cap/plug usually at the top of the tank with a tire valve. Use a tire pressure gauge to make sure that it is only a couple PSI lower than the low number on your switch. i.e. for a 40/60, you want about 35-38 PSI. Turn water back on and pressurize system. Pump should run less frequently. If it takes months/years until it starts constantly running, then you are okay. If it starts running constantly right away, then you may need a new tank. I am not a plumber, so please get a second opinion :)

The contacts are sparking?

Only after extended use, the contacts can become dirty. If you are sparking with a brand new unit either the in-rush current is extremely high or you have low pressure on the pressure tank. The bladder needs to have sufficient pressure to activate the pressure switch firmly without sparking. Rule of thumb is 3psi above the cut-in pressure. See video below; https://www.youtube.com/watch?v=bA-X6vRlDc0

What is the difference between Form U and any other Form?

What do you meand ' form D"? The reason I use this one is that it has a lever on the side that allows me to turn pump on when it drops below set low. The auto ones don't work with my well setup.

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Description

💧 Master your water pressure like a pro — never miss a drop!

DURABLE RELIABLE - IP54 rated for dust and splash resistance in demanding environments
EFFORTLESS INTEGRATION - Standard 1/4-inch NPSF internal thread for easy installation
PLUG PLAY CONNECTIVITY - Wire leads and screw terminals for seamless setup
SMART LOW PRESSURE CUT OFF - Automatically safeguards your system at 40 PSI
ROCK SOLID PRESSURE CONTROL - Handles up to 220 PSI for ultimate pump protection

The Telemecanique FSG2J24M4CP Pumptrol Water Pressure Switch offers precise control for electrically driven water pumps with a robust 220 PSI max rating and a smart low pressure cut-off at 40 PSI. Featuring diaphragm actuation, wire lead connectors, and IP54 protection, it ensures reliable, durable performance and easy installation for professional-grade plumbing systems.

Specifications

Operation Mode	automatic
Contact Type	Normally Open
Connector Type	Wire Leads
Brand	Schneider Electric
Terminal	Screw
Circuit Type	1-way
Mounting Type	Wall Mount
International Protection Rating	IP54
Connectivity Protocol	X-10
Color	Original Version
Unit Count	1.0 Count
Number of Items	1
Global Trade Identification Number	00047569177828, 00784497765641
Manufacturer	Telemecanique Sensors
UPC	784497765641 047569177828
Part Number	FSG2J24M4CP
Item Weight	14.1 ounces
Item model number	FSG2J24M4CP
Is Discontinued By Manufacturer	No
Size	Standard
Style	Diaphragm
Power Source	Ac Adapter
Item Package Quantity	1
Cutting Diameter	5 Inches
Included Components	Square D by Schneider Electric FSG2J24M4CP 40-60 PSI Pumptrol Water Pressure Switch with Low Pressure Cut-Off
Batteries Included?	No
Batteries Required?	No
Warranty Description	Warranty
Assembled Diameter	5 Inches

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